How to Replace the Battery in a 2008 Mercury Grand Marquis Key Fob

How to Replace the Battery in a 2008 Mercury Grand Marquis Key Fob

If your Grand Marquis key isn't unlock doors correct, the cell battery surely must to be changed. In this case, we are going to tell you how to open Mercury remote key fob and replace a dead battery DIY. If you decide to do it at home near Grand Marquis, follow our guide, but first make sure you have tools and materials required.

What size battery does 2008 Mercury Grand Marquis key fob required

Replacing battery in keyless entry remote require 1xCR2032 battery and flat head screwdriver. Prepare these materials and tools before opening and make sure to match the type of your fob’s batteries.
  • flat head screwdriver
  • 1xCR2032 battery

Simple steps to replace the battery in your car's key fob

Inside of your key fob installed small button cell battery. Accurately try to open your remote key fob with pry tools. Remove one CR2032 battery with flat head screwdriver.

Now it's time to install new battery in keyless entry fob's case. Be sure to connect the battery the right way around in a circuit. Your remote key fob will not work if you connect battery wrong way.

After the new battery installed, check remote key fob functionality by pressing buttons. If all functions works, assemble your fob’s case in reverse order.

The last thing to do is put your cover back on fob. Carefully try to assemble the pieces together by hands from top to bottom. Check your fob body for gaps. If it is not tightly closed try to repeat last step.

Key Fob Battery Replacement 2008 Mercury Grand Marquis Video

How To Replace Mercury Grand Marquis Key Fob Battery 2007 2008 2009 2010 2011

Still not working? Buy new one


Remote key fob of Mercury Grand Marquis require 1xCR2032 batteries. Most CR2032 batteries are under $6 depending on the brand, size packaging and type you buy. You can take old battery to the store, to find a proper replacement.

Keyless entry remote in most of cases do not require to be reprogrammed after battery replace. If your remote key fob not working, recheck new battery voltage. Otherwise, read user's manual or contact local dealer.

Yes, you can change battery in your 2008 Mercury Grand Marquis remote key fob yourself. Most difficult part is to open fob’s case. It's pretty simple with our step by step guide.

The price to replace the battery inside fob can run anywhere $50-600 depending on the make and the service pricing.

Remote key fob batteries in modern cars should be changed once in four years, although this will vary based on their amount of use and build quality. If your keyless entry remote reduced signal strength, you should replace batteries before it stop working and make problems for you.

These symptoms will warning you that it's probably time to replace battery in your 2008 Mercury Grand Marquis: key fob buttons not working, signal strength reduced, multiple clicks to unlock or lock doors required and low key battery indicator on dashboard.
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Fob Compatibility:

  1. FCC ID: OUCD6000022
  2. Models: 2006-2011 Mercury Grand Marquis